“They are men, sure enough,” replied Jerry, “but you needn’t get excited over it.”

“I’m not,” went on Bob. “Only one of them is Mr. Blowitz, that’s all.”

“Mr. Blowitz?” queried Jerry sharply.

“Hush! He’ll hear you,” cautioned Rose. “Sounds carry very easily over water.”

“It is Mr. Blowitz,” admitted Jerry. “I wonder what he’s doing out here.”

“Probably getting some more information about the brig Rockhaven,” suggested Ned. “Maybe that’s a seaman who has some news of her.”

By this time the motor boat was quite close to the two men, who, however, did not seem to notice the Ripper. There was no question about the identity of Mr. Blowitz. The other man was a stranger to the boys and girls. The two were apparently talking earnestly, and, occasionally Mr. Blowitz could be seen to be gesticulating violently.

“He’s mad about something,” declared Ned.

“It does look so,” agreed Rose.

All at once the boys saw Blowitz take a step toward the other man, who retreated, as if afraid. Blowitz raised his hand as though to give a blow.